Hand brake



Aung. 14, 192s. www

C. E. DATH HAND BRAKE Filed Nov. 25, 1925 Z ff y l? za lilatented Aug. lll, l..

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CIARIES E/DATH, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO W. H. MINEB., INC., A CORPORATIDN GF DELAWARE.

HAND BRAKE.

appncaaon ined November 2a, lesa. serial No. 676,468.

This invention relates to improvements in hand brakes for railway ears.

Une object of the invention is to provide asimple and ei'iieient hand brake, wherein a 5 high powered pull on the brake chain is had and either a slow graduated or quick full release may be obtained.

Another object of the invention is to provide a hand brake of' the type indicated, including a hand wheel wherein ,the hand wheel serves the dual function of operating means for tightening brakes and operating means for releasing mechanism.

A more specific object or" the invention is to provide a hand brake of the worm and nut type, wherein the nut is composed of sections which are displaceable t effect instantaneous relea'seof the brakes.

Other objects and advantages of the in- 20 vention will more clearly appear from the description and` claims hereinafter following. y

In the drawing forming a part of this speeiiieaton, Fig. lis a vertical, sectional view through the end portion of av car, showing my improvements applied thereto. ld ig.

2 isan` enlarged, vertical, sectional view,

partly broken away, of the split nut, housing and adjacent parts of the brake mechaso nism, the worm being shown in side elevation. Figs. 3 and t are horizontal, sectional views, corresponding, respectively, to the lines 3*?3 and loi Figure 2. In the drawing, 10 denotes the corrugated vsheet lInet-al end wall panel of a boX car, 11 the roof, 12 an end-plate, 13 an end plate tacia board, 14': a platform for the brakeman -and 15 an upper bearing'bracket. The improved hand Abrake mechanism comprises, broadly, a combined hand wheel7 sleeve and housing A; a split nutB; a pull rod C;a combined pull rod guide bracket and bearing member D; and a combined pull rod guide and stop bracket E.

The combined hand wheel sleeve and housing A, comprisesa hand wheel 16, a

hollow cylindricalsle'eve 17 formed integral Vwith the hand wheel and downwardly extending from the hub thereof 'and a housing 18 formed integral with the sleeve. Although the hand wheel isQshown as formed integral with the sleeve 17 Vit will be evident that the hand wheel may be detachably connected to the sleeve `17 by forcing therupper yi end of thesleeve with a square extension adaptedtoaccommodate the standard brake wheel held in position by the usual nut. The. sleeve 17. is rotatably and slidably mounted in the bearing bracket 15. The housing 18 is of hollow, truncated, l'our sided pyramidal form and comprises vertically extending side walls 19--19, upwardly converging end walls 20--20 and a top wall 21, which forms a continuation ot the sleeve 17. The housing 18 has the bottom thereof closed by a pair otplates 22. The plates are oi' like construction and each is provided with an upwardly extendingv peripheral. flange 23, and semi-cylindrical upwardly and downwardly projecting inner flanges 24, adapted to form a bearing sleeve when the parts' are assembled. The'bottom plates 22vare held in iixed position by screws 25, or any other suitable means, passing threugh the end walls 20 of the housing 18, and the flanges 23 of the plates 22. The side walls 19 ofthe housing 18 are provided with interior, upwardly converging pairs of relatively short ribs 26S-26, spaced from the end walls and parallel thereto. As clearly shown in Fig. 2, the ribs 26 extend upwardly from the peripheral flange 23 and terminate at the lower side ot' the nut B, when the latter is in the extreme position at the upper end of the housing.

The split nut B comprises a pair of similar blocks 27-27. Each ot' the blocks 27 is provided with a flat outer tace 28 similarly inclined to and adapted to co-act with the end walls 20 of the housing 1S. The inner faces 29 of the blocks27 are provided with interrupted threads 30 adapted Vto co-act Ywith threads 31 at the upper end of the pull rod C. The blocks 27 also have their opposite side faces provided'with grooves 32 similarly inclined to the ribs 26 to effect separation of the block sections 27 of the nut B, i when the housing Ais/ moved upwardly. Up-

ward movement of the nut within the housing-1s limited by contact with the top wall 21 ot the latter.

The bracket D, which is rigidlysecured to the end, plate 12 and panel 10 of the car by means ot bolts 33, is provided with an upwardly extending cylindrical sleeve portion `Sil, adapted to co-act with the semi-cylindrieal flanges 24 of the housing 18, forming a bearing therefor.V At the upper end, the sleeve portion 34 is provided with a peripheral ange 35 adapted to co-aet with the up- Vsliding movement in the platform 14, the

guide member D and guide member The guide member E is rigidly secured to the end panel of the car, and the pull rod C 1s provided with a peripheral flange 3S near the lower end portion thereof adapted to' v(3o-act with the bracket E to limit the downward n'iovcment of the same. To preventrotary movement of the pull rod C, a vertical slot 39'is provided at the upper end thereof, which lco-acts with a vertically extending` i integral rib 139 on the interior of the sleeve portion 34 of the bracket D. The lower end of the pull rod C is connected to the brake mechanism proper by means of the chain 4:0

i passing over the grooved pulley 41, j ournaled inl the bracket 42 rigidly secured to the Vend panel 1 0 and the bottom of the car.

The operation of the device is as f-ollows. Uponrotation of the handwheel 16, in a clockwise direction, with the nut in the position shown in Figs. 1, 2 and 3, the pull rod will be fed upwardly, rotation thereof being prevented by the rib 139 engaging within the slot 39. .The upward movement of the pull red C effects a tightening of the brake chain 40, thereby applying the brakes. Rotation of the hand wheel 16 in a counterclockwise direction will eifect the reverse movement of the pull rod C. thereby gradually releasing the brakes. To effect a quick releasing of the brakes, the hand wheel 16 is pulled upwardly, moving the housing 18 therewith and entering theV ribs 26 within the slots 32 of the nut sections 27. Due to the converging arrangement of the ribs 26 and the grooves 32, separation of the sections of the nut B will be effected, thereby disengaging thethreaded portions thereof from the threads of the pull rod, entirely disconnecting the nut from the pull rod C and .instantly releasing the brakes. It will be evident that the nut sections will re-engage with the threaded portionautomatically dne to the weight ofthe hand wheel and attached parts causingthe same to drop down as soon aslthe upward pull thereon is released, thereby moving the housing downwardly relatively to the nut sections 27, which are held in fixed position by abutment with the flange 35 ofthe vbracket D, whereupon the -nut sections will be moved inwardly by coacting inclined facesof the nut sections and the end walls -20 of the housing l18, again bringing the parts into operative relation, so that when the hand wheel 16 is again rotated in a clock-wise direction the` brakesV will be appliedfas hereinbefore described. It will be evident that automatic means 1s thus provided for re-engaging the `nut sections with the `threaded ,portion of the pull rod as soon as the operator releases his hold on the hand wheel so that the mechanism is ready for the next brake settingV operation.

From the preceeding description, considered in connection vwith the drawing, 1t will be seen that my improved mechanism provides for heavy pullsV on the brake chain and that, in releasing thebrakes, the brakeman may either gradually ease off the brakes when spotting the carsor release the brakes entirely at once, thus overcoming an objection sometimes made to hand brakes employing a self-locking worm arrangement,

I have herein shown and described Vwhat Iv now consider the preferred manner of carrying out the invention, lbut the same is merely illustrative and I contemplate all changes and modiiications that come within the scope of the claims appended hereto.

VI claim:

1. In a hand'brake, the combination with a brake mechanismV proper; of operating means there-for; anda releasable connection between said mechanism and means Comprising a worm and a rotatable'split nut, the split portions of said Vnut being bodily separable a'nd slidably Vconnected to said operating means. l

2. In a hand brake, the combination with a pull rodV having one end thereof provided with threads; of a rotary operating member; 100 a sectional nut carried by and rotatable with said operating member and longitudinally slidable with reference to the latter, said nut being Vadapted to co-act with the threaded endof said rod; and means including guides los for displacing the sections of said nut, at will, to release the brakes.

3. In a hand brake, the `combination with. a Vpull rod having one end thereof provided with threads; of'a 4rotary operating mem- 11ober; a split nut carried by'and rotatable with said operating member, saidV nutbeing Vadapted to Veo-act with the threadedend of said rod ,and means, including'guides fixed with reference to said operating member for controllling the engagement said nut and pull roc.

i L In a hand brake, the combination with a vertically, movable pull rod having a threaded npperend; ofmeans for preventl ing rotation of said rod; a sectionalv nut eoacting with the threaded portion of said rod;

ahand wheel; an operating sha-ft rigid with said hand wheel, said shaft .being mounted l .for rotation and reservation; 'means for 125 connect-ing said lnut te saidshaft for retaton therewith; 'and .C0-@Othis means O11 said mit and Connecting means t0 @Heet disengagement o f theV sections of said nut from the worm to thereby release .the brakes., 139 l 5. In a hand brake, the combination With a vertically movable pull rod havinga threaded upper end; of a sectional nut coacting with said threaded portions of said rod; a hand Wheel; an operating shaft rigid with said hand Wheel, said shaft being mounted for rotation and reciprocation; means for connecting said nut to said shaft forrotation therewith, said means being effective, upon reciprocation ofrsaid shaft, to separate the sections of the nut and release the brakes.

6. In a hand brake, the combination With a vertically movable pull rod memberg-of a rotary and vertically movable operating member having a hand Wheel rigid therewith, said members having threaded engagement With each other to effect movement of said pull rod upon said operating member being rotated; and means associated with said operating member for disconnecting said members at Vtheir point of threaded engagement upon vertical Vmovement of sait operating member in one direction, thereby affecting instantaneous release of the brakes.

7 In ahand brake, the combination with i a hand Wheel having a housing and connecting shaft formed integral therewith; of a Vsplit sectional nut slidably mounted Withinl the Vhousing and rotatable in unison therewith; co-acting means on the housing and nut for effecting separation of said sections; a pull rod having a threaded upper end coacting With said nut; a plurality of brackets igor guiding said pull rod for vertical slidving. movement, said brackets and pull rod having co-acting meansv thereon preventing rotation and limiting the sliding movement of said pull rod; a bearing bracket for guiding said shaft for rotary and vertical movement; and means on said last named bracket for limiting the vertical movement of the housing and forming an abutment of said nut.

8. In a hand brake, the combination with a brake mechanism proper; of operating means therefor; and means including a separable nut arrangement actuated by the 'force of gravity for connecting said operating means and mechanism, said second named means being manually operable to disconnect the same from said operating means and mechanism.

In witness that I claim the fore-going I have hereunto subscribed my name this 20th day of November 1923.

CHARLES E. DATH. 

